Photo: Bill Ingalls · Public domain (US government)
Mission
Government/Top Secret · PO
Tranche 1 Transport Layer C is one of six missions by the United States Space Force Space Development Agency (SDA) for the Proliferated Warfighter Space Architecture (PWSA) Tranche 1 Transport Layer constellation, which will provide assured, resilient, low-latency military data and connectivity…
What it put in orbit
Passes over you For a few days after launch the 21 satellites fly one behind another, a “train” you can see as a line of moving stars. When will it cross your sky?
| Object | Type | Orbit | Globe |
|---|---|---|---|
| SDA_1664 2025-230A | Payload | 970 × 971 km · 81.3° | Globe |
| SDA_1665 2025-230B | Payload | 956 × 957 km · 81.3° | Globe |
| SDA_1666 2025-230C | Payload | 957 × 957 km · 81.3° | Globe |
| SDA_1667 2025-230D | Payload | 958 × 959 km · 81.3° | Globe |
| SDA_1668 2025-230E | Payload | 947 × 950 km · 81.3° | Globe |
| SDA_1669 2025-230F | Payload | 956 × 960 km · 81.3° | Globe |
| SDA_1670 2025-230G | Payload | 970 × 971 km · 81.3° | Globe |
| SDA_1671 2025-230H | Payload | 969 × 972 km · 81.3° | Globe |
Show all 21 objects
| SDA_1672 2025-230J | Payload | 955 × 957 km · 81.3° | Globe |
| SDA_1673 2025-230K | Payload | 956 × 956 km · 81.3° | Globe |
| SDA_1674 2025-230L | Payload | 956 × 957 km · 81.3° | Globe |
| SDA_1675 2025-230M | Payload | 945 × 949 km · 81.3° | Globe |
| SDA_1676 2025-230N | Payload | 970 × 971 km · 81.3° | Globe |
| SDA_1677 2025-230P | Payload | 970 × 971 km · 81.3° | Globe |
| SDA_1678 2025-230Q | Payload | 945 × 947 km · 81.3° | Globe |
| SDA_1679 2025-230R | Payload | 945 × 949 km · 81.3° | Globe |
| SDA_1680 2025-230S | Payload | 943 × 948 km · 81.3° | Globe |
| SDA_1681 2025-230T | Payload | 943 × 948 km · 81.3° | Globe |
| SDA_1682 2025-230U | Payload | 970 × 971 km · 81.3° | Globe |
| SDA_1683 2025-230V | Payload | 970 × 971 km · 81.3° | Globe |
| SDA_1684 2025-230W | Payload | 970 × 971 km · 81.3° | Globe |
COSPAR ID 2025-230. Orbits from the CelesTrak satellite catalogue (perigee × apogee, inclination).